That part of SOUTH AUSTRALIA west of longitude 139° 21'E from the Queensland/South Australian border to the main road from Walker Flat to Mt Pleasant and north of a line consisting of:- this road west through Angas Valley, Mt Pleasant, Birdwood, Gumeracha to Gorge Road south-west along Gorge Road through Cudlee Creek and Castambul to the eastern boundary of the City of Campbelltown, north along that boundary to the River Torrens, south-west along the River Torrens to Hackney Road, south along Hackney Road, Dequetteville Terrace and Fullarton Road to Greenhill Road, west along Greenhill Road to Anzac Highway, south-west along Anzac Highway to the Sturt River, north-west along the Sturt River to Anderson Avenue, west along Anderson Avenue extended to the Gulf of St Vincent; plus Kangaroo Island; and that portion of NORTHERN TERRITORY south of the 21st degree of latitude.